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Date: Tue, 29 Mar 2022 15:12:44 +0000
From: "Drewek, Wojciech" <wojciech.drewek@...el.com>
To: "Lobakin, Alexandr" <alexandr.lobakin@...el.com>,
"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "Fijalkowski, Maciej" <maciej.fijalkowski@...el.com>,
Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
Marcin Szycik <marcin.szycik@...ux.intel.com>,
"Szapar-Mudlaw, Martyna" <martyna.szapar-mudlaw@...el.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v4 net-next 5/5] ice: switch: convert packet template
match code to rodata
Hi Alex,
> -----Original Message-----
> From: Lobakin, Alexandr <alexandr.lobakin@...el.com>
> Sent: poniedziałek, 21 marca 2022 12:00
> To: intel-wired-lan@...ts.osuosl.org
> Cc: Lobakin, Alexandr <alexandr.lobakin@...el.com>; Fijalkowski, Maciej <maciej.fijalkowski@...el.com>; Michal Swiatkowski
> <michal.swiatkowski@...ux.intel.com>; Drewek, Wojciech <wojciech.drewek@...el.com>; Marcin Szycik
> <marcin.szycik@...ux.intel.com>; Szapar-Mudlaw, Martyna <martyna.szapar-mudlaw@...el.com>; David S. Miller
> <davem@...emloft.net>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Subject: [PATCH v4 net-next 5/5] ice: switch: convert packet template match code to rodata
>
> Trade text size for rodata size and replace tons of nested if-elses
> to the const mask match based structs. The almost entire
> ice_find_dummy_packet() now becomes just one plain while-increment
> loop. The order in ice_dummy_pkt_profiles[] should be same with the
> if-elses order previously, as masks become less and less strict
> through the array to follow the original code flow.
> Apart from removing 80 locs of 4-level if-elses, it brings a solid
> text size optimization:
>
> add/remove: 0/1 grow/shrink: 1/1 up/down: 2/-1058 (-1056)
> Function old new delta
> ice_fill_adv_dummy_packet 289 291 +2
> ice_adv_add_update_vsi_list 201 - -201
> ice_add_adv_rule 2950 2093 -857
> Total: Before=414512, After=413456, chg -0.25%
> add/remove: 53/52 grow/shrink: 0/0 up/down: 4660/-3988 (672)
> RO Data old new delta
> ice_dummy_pkt_profiles - 672 +672
> Total: Before=37895, After=38567, chg +1.77%
>
> Signed-off-by: Alexander Lobakin <alexandr.lobakin@...el.com>
> Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
> Tested-by: Marcin Szycik <marcin.szycik@...ux.intel.com>
> ---
> drivers/net/ethernet/intel/ice/ice_switch.c | 215 ++++++++++----------
> 1 file changed, 108 insertions(+), 107 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c
> index cde9e480ea89..ed7130b7abfe 100644
> --- a/drivers/net/ethernet/intel/ice/ice_switch.c
> +++ b/drivers/net/ethernet/intel/ice/ice_switch.c
> @@ -30,6 +30,19 @@ static const u8 dummy_eth_header[DUMMY_ETH_HDR_LEN] = { 0x2, 0, 0, 0, 0, 0,
> 0x2, 0, 0, 0, 0, 0,
> 0x81, 0, 0, 0};
>
> +enum {
> + ICE_PKT_VLAN = BIT(0),
> + ICE_PKT_OUTER_IPV6 = BIT(1),
> + ICE_PKT_TUN_GTPC = BIT(2),
> + ICE_PKT_TUN_GTPU = BIT(3),
> + ICE_PKT_TUN_NVGRE = BIT(4),
> + ICE_PKT_TUN_UDP = BIT(5),
> + ICE_PKT_INNER_IPV6 = BIT(6),
> + ICE_PKT_INNER_TCP = BIT(7),
> + ICE_PKT_INNER_UDP = BIT(8),
> + ICE_PKT_GTP_NOPAY = BIT(9),
> +};
> +
> struct ice_dummy_pkt_offsets {
> enum ice_protocol_type type;
> u16 offset; /* ICE_PROTOCOL_LAST indicates end of list */
> @@ -38,23 +51,23 @@ struct ice_dummy_pkt_offsets {
> struct ice_dummy_pkt_profile {
> const struct ice_dummy_pkt_offsets *offsets;
> const u8 *pkt;
> + u32 match;
> u16 pkt_len;
> };
>
> -#define ICE_DECLARE_PKT_OFFSETS(type) \
> - static const struct ice_dummy_pkt_offsets \
> +#define ICE_DECLARE_PKT_OFFSETS(type) \
> + static const struct ice_dummy_pkt_offsets \
> ice_dummy_##type##_packet_offsets[]
>
> -#define ICE_DECLARE_PKT_TEMPLATE(type) \
> +#define ICE_DECLARE_PKT_TEMPLATE(type) \
> static const u8 ice_dummy_##type##_packet[]
>
> -#define ICE_PKT_PROFILE(type) ({ \
> - (struct ice_dummy_pkt_profile){ \
> - .pkt = ice_dummy_##type##_packet, \
> - .pkt_len = sizeof(ice_dummy_##type##_packet), \
> - .offsets = ice_dummy_##type##_packet_offsets, \
> - }; \
> -})
> +#define ICE_PKT_PROFILE(type, m) { \
> + .match = (m), \
> + .pkt = ice_dummy_##type##_packet, \
> + .pkt_len = sizeof(ice_dummy_##type##_packet), \
> + .offsets = ice_dummy_##type##_packet_offsets, \
> +}
>
> ICE_DECLARE_PKT_OFFSETS(gre_tcp) = {
> { ICE_MAC_OFOS, 0 },
> @@ -1220,6 +1233,55 @@ ICE_DECLARE_PKT_TEMPLATE(ipv6_gtp) = {
> 0x00, 0x00,
> };
>
> +static const struct ice_dummy_pkt_profile ice_dummy_pkt_profiles[] = {
> + ICE_PKT_PROFILE(ipv6_gtp, ICE_PKT_TUN_GTPU | ICE_PKT_OUTER_IPV6 |
> + ICE_PKT_GTP_NOPAY),
> + ICE_PKT_PROFILE(ipv6_gtpu_ipv6_udp, ICE_PKT_TUN_GTPU |
> + ICE_PKT_OUTER_IPV6 |
> + ICE_PKT_INNER_IPV6 |
> + ICE_PKT_INNER_UDP),
> + ICE_PKT_PROFILE(ipv6_gtpu_ipv6_tcp, ICE_PKT_TUN_GTPU |
> + ICE_PKT_OUTER_IPV6 |
> + ICE_PKT_INNER_IPV6),
> + ICE_PKT_PROFILE(ipv6_gtpu_ipv4_udp, ICE_PKT_TUN_GTPU |
> + ICE_PKT_OUTER_IPV6 |
> + ICE_PKT_INNER_UDP),
> + ICE_PKT_PROFILE(ipv6_gtpu_ipv4_tcp, ICE_PKT_TUN_GTPU |
> + ICE_PKT_OUTER_IPV6),
> + ICE_PKT_PROFILE(ipv4_gtpu_ipv4, ICE_PKT_TUN_GTPU | ICE_PKT_GTP_NOPAY),
> + ICE_PKT_PROFILE(ipv4_gtpu_ipv6_udp, ICE_PKT_TUN_GTPU |
> + ICE_PKT_INNER_IPV6 |
> + ICE_PKT_INNER_UDP),
> + ICE_PKT_PROFILE(ipv4_gtpu_ipv6_tcp, ICE_PKT_TUN_GTPU |
> + ICE_PKT_INNER_IPV6),
> + ICE_PKT_PROFILE(ipv4_gtpu_ipv4_udp, ICE_PKT_TUN_GTPU |
> + ICE_PKT_INNER_UDP),
> + ICE_PKT_PROFILE(ipv4_gtpu_ipv4_tcp, ICE_PKT_TUN_GTPU),
> + ICE_PKT_PROFILE(ipv6_gtp, ICE_PKT_TUN_GTPC | ICE_PKT_OUTER_IPV6),
> + ICE_PKT_PROFILE(ipv4_gtpu_ipv4, ICE_PKT_TUN_GTPC),
> + ICE_PKT_PROFILE(gre_ipv6_tcp, ICE_PKT_TUN_NVGRE | ICE_PKT_INNER_IPV6 |
> + ICE_PKT_INNER_TCP),
> + ICE_PKT_PROFILE(gre_tcp, ICE_PKT_TUN_NVGRE | ICE_PKT_INNER_TCP),
> + ICE_PKT_PROFILE(gre_ipv6_udp, ICE_PKT_TUN_NVGRE | ICE_PKT_INNER_IPV6),
> + ICE_PKT_PROFILE(gre_udp, ICE_PKT_TUN_NVGRE),
> + ICE_PKT_PROFILE(udp_tun_ipv6_tcp, ICE_PKT_TUN_UDP |
> + ICE_PKT_INNER_IPV6 |
> + ICE_PKT_INNER_TCP),
> + ICE_PKT_PROFILE(udp_tun_tcp, ICE_PKT_TUN_UDP | ICE_PKT_INNER_TCP),
> + ICE_PKT_PROFILE(udp_tun_ipv6_udp, ICE_PKT_TUN_UDP |
> + ICE_PKT_INNER_IPV6),
> + ICE_PKT_PROFILE(udp_tun_udp, ICE_PKT_TUN_UDP),
> + ICE_PKT_PROFILE(vlan_udp_ipv6, ICE_PKT_OUTER_IPV6 | ICE_PKT_INNER_UDP |
> + ICE_PKT_VLAN),
> + ICE_PKT_PROFILE(udp_ipv6, ICE_PKT_OUTER_IPV6 | ICE_PKT_INNER_UDP),
> + ICE_PKT_PROFILE(vlan_udp, ICE_PKT_INNER_UDP | ICE_PKT_VLAN),
> + ICE_PKT_PROFILE(udp, ICE_PKT_INNER_UDP),
> + ICE_PKT_PROFILE(vlan_tcp_ipv6, ICE_PKT_INNER_IPV6 | ICE_PKT_VLAN),
> + ICE_PKT_PROFILE(tcp_ipv6, ICE_PKT_INNER_IPV6),
I think that in both "vlan_tcp_ipv6" and "tcp_ipv6" we should use ICE_PKT_OUTER_IPV6 instead
of ICE_PKT_INNER_IPV6. We are not dealing with tunnels in those cases so inner addresses are
incorrect here.
Thanks,
Wojtek
> + ICE_PKT_PROFILE(vlan_tcp, ICE_PKT_VLAN),
> + ICE_PKT_PROFILE(tcp, 0),
> +};
> +
> #define ICE_SW_RULE_RX_TX_ETH_HDR_SIZE \
> (offsetof(struct ice_aqc_sw_rules_elem, pdata.lkup_tx_rx.hdr) + \
> (DUMMY_ETH_HDR_LEN * \
> @@ -5509,124 +5571,63 @@ ice_add_adv_recipe(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
> *
> * Returns the &ice_dummy_pkt_profile corresponding to these lookup params.
> */
> -static struct ice_dummy_pkt_profile
> +static const struct ice_dummy_pkt_profile *
> ice_find_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
> enum ice_sw_tunnel_type tun_type)
> {
> - bool inner_tcp = false, inner_udp = false, outer_ipv6 = false;
> - bool vlan = false, inner_ipv6 = false, gtp_no_pay = false;
> + const struct ice_dummy_pkt_profile *ret = ice_dummy_pkt_profiles;
> + u32 match = 0;
> u16 i;
>
> + switch (tun_type) {
> + case ICE_SW_TUN_GTPC:
> + match |= ICE_PKT_TUN_GTPC;
> + break;
> + case ICE_SW_TUN_GTPU:
> + match |= ICE_PKT_TUN_GTPU;
> + break;
> + case ICE_SW_TUN_NVGRE:
> + match |= ICE_PKT_TUN_NVGRE;
> + break;
> + case ICE_SW_TUN_GENEVE:
> + case ICE_SW_TUN_VXLAN:
> + match |= ICE_PKT_TUN_UDP;
> + break;
> + default:
> + break;
> + }
> +
> for (i = 0; i < lkups_cnt; i++) {
> if (lkups[i].type == ICE_UDP_ILOS)
> - inner_udp = true;
> + match |= ICE_PKT_INNER_UDP;
> else if (lkups[i].type == ICE_TCP_IL)
> - inner_tcp = true;
> + match |= ICE_PKT_INNER_TCP;
> else if (lkups[i].type == ICE_IPV6_OFOS)
> - outer_ipv6 = true;
> + match |= ICE_PKT_OUTER_IPV6;
> else if (lkups[i].type == ICE_VLAN_OFOS)
> - vlan = true;
> + match |= ICE_PKT_VLAN;
> else if (lkups[i].type == ICE_ETYPE_OL &&
> lkups[i].h_u.ethertype.ethtype_id ==
> cpu_to_be16(ICE_IPV6_ETHER_ID) &&
> lkups[i].m_u.ethertype.ethtype_id ==
> cpu_to_be16(0xFFFF))
> - outer_ipv6 = true;
> + match |= ICE_PKT_OUTER_IPV6;
> else if (lkups[i].type == ICE_ETYPE_IL &&
> lkups[i].h_u.ethertype.ethtype_id ==
> cpu_to_be16(ICE_IPV6_ETHER_ID) &&
> lkups[i].m_u.ethertype.ethtype_id ==
> cpu_to_be16(0xFFFF))
> - inner_ipv6 = true;
> + match |= ICE_PKT_INNER_IPV6;
> else if (lkups[i].type == ICE_IPV6_IL)
> - inner_ipv6 = true;
> + match |= ICE_PKT_INNER_IPV6;
> else if (lkups[i].type == ICE_GTP_NO_PAY)
> - gtp_no_pay = true;
> - }
> -
> - if (tun_type == ICE_SW_TUN_GTPU) {
> - if (outer_ipv6) {
> - if (gtp_no_pay) {
> - return ICE_PKT_PROFILE(ipv6_gtp);
> - } else if (inner_ipv6) {
> - if (inner_udp)
> - return ICE_PKT_PROFILE(ipv6_gtpu_ipv6_udp);
> - else
> - return ICE_PKT_PROFILE(ipv6_gtpu_ipv6_tcp);
> - } else {
> - if (inner_udp)
> - return ICE_PKT_PROFILE(ipv6_gtpu_ipv4_udp);
> - else
> - return ICE_PKT_PROFILE(ipv6_gtpu_ipv4_tcp);
> - }
> - } else {
> - if (gtp_no_pay) {
> - return ICE_PKT_PROFILE(ipv4_gtpu_ipv4);
> - } else if (inner_ipv6) {
> - if (inner_udp)
> - return ICE_PKT_PROFILE(ipv4_gtpu_ipv6_udp);
> - else
> - return ICE_PKT_PROFILE(ipv4_gtpu_ipv6_tcp);
> - } else {
> - if (inner_udp)
> - return ICE_PKT_PROFILE(ipv4_gtpu_ipv4_udp);
> - else
> - return ICE_PKT_PROFILE(ipv4_gtpu_ipv4_tcp);
> - }
> - }
> + match |= ICE_PKT_GTP_NOPAY;
> }
>
> - if (tun_type == ICE_SW_TUN_GTPC) {
> - if (outer_ipv6)
> - return ICE_PKT_PROFILE(ipv6_gtp);
> - else
> - return ICE_PKT_PROFILE(ipv4_gtpu_ipv4);
> - }
> -
> - if (tun_type == ICE_SW_TUN_NVGRE) {
> - if (inner_tcp && inner_ipv6)
> - return ICE_PKT_PROFILE(gre_ipv6_tcp);
> - else if (inner_tcp)
> - return ICE_PKT_PROFILE(gre_tcp);
> - else if (inner_ipv6)
> - return ICE_PKT_PROFILE(gre_ipv6_udp);
> - else
> - return ICE_PKT_PROFILE(gre_udp);
> - }
> + while (ret->match && (match & ret->match) != ret->match)
> + ret++;
>
> - if (tun_type == ICE_SW_TUN_VXLAN ||
> - tun_type == ICE_SW_TUN_GENEVE) {
> - if (inner_tcp && inner_ipv6)
> - return ICE_PKT_PROFILE(udp_tun_ipv6_tcp);
> - else if (inner_tcp)
> - return ICE_PKT_PROFILE(udp_tun_tcp);
> - else if (inner_ipv6)
> - return ICE_PKT_PROFILE(udp_tun_ipv6_udp);
> - else
> - return ICE_PKT_PROFILE(udp_tun_udp);
> - }
> -
> - if (inner_udp && !outer_ipv6) {
> - if (vlan)
> - return ICE_PKT_PROFILE(vlan_udp);
> - else
> - return ICE_PKT_PROFILE(udp);
> - } else if (inner_udp && outer_ipv6) {
> - if (vlan)
> - return ICE_PKT_PROFILE(vlan_udp_ipv6);
> - else
> - return ICE_PKT_PROFILE(udp_ipv6);
> - } else if ((inner_tcp && outer_ipv6) || outer_ipv6) {
> - if (vlan)
> - return ICE_PKT_PROFILE(vlan_tcp_ipv6);
> - else
> - return ICE_PKT_PROFILE(tcp_ipv6);
> - }
> -
> - if (vlan)
> - return ICE_PKT_PROFILE(vlan_tcp);
> -
> - return ICE_PKT_PROFILE(tcp);
> + return ret;
> }
>
> /**
> @@ -5963,8 +5964,8 @@ ice_add_adv_rule(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
> {
> struct ice_adv_fltr_mgmt_list_entry *m_entry, *adv_fltr = NULL;
> struct ice_aqc_sw_rules_elem *s_rule = NULL;
> + const struct ice_dummy_pkt_profile *profile;
> u16 rid = 0, i, rule_buf_sz, vsi_handle;
> - struct ice_dummy_pkt_profile profile;
> struct list_head *rule_head;
> struct ice_switch_info *sw;
> u16 word_cnt;
> @@ -6036,7 +6037,7 @@ ice_add_adv_rule(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
> }
> return status;
> }
> - rule_buf_sz = ICE_SW_RULE_RX_TX_NO_HDR_SIZE + profile.pkt_len;
> + rule_buf_sz = ICE_SW_RULE_RX_TX_NO_HDR_SIZE + profile->pkt_len;
> s_rule = kzalloc(rule_buf_sz, GFP_KERNEL);
> if (!s_rule)
> return -ENOMEM;
> @@ -6096,7 +6097,7 @@ ice_add_adv_rule(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
> s_rule->pdata.lkup_tx_rx.recipe_id = cpu_to_le16(rid);
> s_rule->pdata.lkup_tx_rx.act = cpu_to_le32(act);
>
> - status = ice_fill_adv_dummy_packet(lkups, lkups_cnt, s_rule, &profile);
> + status = ice_fill_adv_dummy_packet(lkups, lkups_cnt, s_rule, profile);
> if (status)
> goto err_ice_add_adv_rule;
>
> @@ -6104,7 +6105,7 @@ ice_add_adv_rule(struct ice_hw *hw, struct ice_adv_lkup_elem *lkups,
> rinfo->tun_type != ICE_SW_TUN_AND_NON_TUN) {
> status = ice_fill_adv_packet_tun(hw, rinfo->tun_type,
> s_rule->pdata.lkup_tx_rx.hdr,
> - profile.offsets);
> + profile->offsets);
> if (status)
> goto err_ice_add_adv_rule;
> }
> --
> 2.35.1
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